netdev - Re: TCP-MD5 checksum failure on x86

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <l2s571fb4001005040728t91979906ofa10cf0714c305b2@mail.gmail.com>
Date:	Tue, 4 May 2010 19:58:32 +0530
From:	Bhaskar Dutta <bhaskie@...il.com>
To:	Ben Hutchings <bhutchings@...arflare.com>
Cc:	netdev@...r.kernel.org
Subject: Re: TCP-MD5 checksum failure on x86_64 SMP

On Tue, May 4, 2010 at 5:02 PM, Ben Hutchings <bhutchings@...arflare.com> wrote:
> On Tue, 2010-05-04 at 09:00 +0530, Bhaskar Dutta wrote:
>> Hi,
>>
>> I am observing intermittent TCP-MD5 checksum failures
>> (CONFIG_TCP_MD5SIG)  on kernel 2.6.31 while talking to a BGP router.
>>
>> The problem is only seen in multi-core 64 bit machines.
>> Is there any known bug in the per_cpu_ptr implementation (I am aware
>> that the percpu allocator has been re-implemented in 2.6.33) that
>> might cause a corruption in 64 bit SMP machines?
>>
>> Any pointers would be appreciated.
>
> There was another recent report of incorrect MD5 signatures in
> <http://thread.gmane.org/gmane.linux.network/159556>, but without any
> response.
>
> Ben.
>

I found another thread posted back in Jan 2007 with a similar bug
(x86_64 on 2.6.20) but no replies to that as well.
http://lkml.org/lkml/2007/1/20/56

Bhaskar
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html